Intense sound system based on full-band sound wave control

Abstract

The invention discloses an intense sound system based on full-band sound wave control, and relates to the technical field of loudspeakers, and the main points of the technical scheme are that the intense sound system comprises a main box body, and the main box body is internally provided with a DSP signal processor, a first power amplifier, a second power amplifier, a transmission waveguide, an intense sound transducer group and an anti-interference transducer group; the intense sound transducer group is positioned in front of the intense sound component; the input end of the DSP signal processor is connected with a sound source signal, and the DSP signal processor comprises a first signal processing unit and a second signal processing unit; the first signal processing unit, the first power amplifier, the strong sound transducer group and the transmission waveguide are connected in sequence; and the second signal processing unit, the second power amplifier and the anti-interference transducer group are sequentially connected, and the second signal processing unit processes the sound source signal into a sound spectrum opposite to the phase of noise transmitted to the back of the strong sound component. Full-band control of rear interference sound waves is realized.

Description

technical field [0001] The invention relates to the technical field of loudspeakers, more specifically, it relates to a strong sound system based on full-band sound wave control. Background technique [0002] The strong sound system can radiate high-intensity audible sound and is widely used in aviation, navigation and security fields such as voice broadcast, control and dispersal of crowds, mountain search and rescue, and airport bird repelling. A loudspeaker system is a speaker system capable of outputting sound at a high sound pressure level. Directivity and sound pressure level are the main performance parameters of the audio reinforcement system. [0003] The directivity of a loudspeaker system has a significant relationship with the loudspeaker array, the number of loudspeaker units, and the beamforming method. The existing strong sound system has the following defects: (1) At present, the planar array is a commonly used design formation for the strong sound system. ...

AI Technical Summary

Problems solved by technology

The existing strong sound system has the following defects: (1) At present, the planar array is a commonly used design formation for the strong sound system. The planar array can be equivalent to a combination of loudspeakers arranged at equal intervals. The distance of the transducer is used to control the beam angle of the sound wave. The sound wave is the loudest in the axial direction, but the sound field in the coverage area is not uniform, and there are obvious strong side beam lobes outside the coverage area, which is harmful to people and people outside the coverage area. substances that cause interference and affect the use of the product

(2) In terms of sound pressure level, it is formed by superimposing multiple electric transducers or multiple piezoelectric transducers through ordinary horns, which has the problems of poor coupling and inconsistent phases; The sound waves of the transducer cannot be effectively superimposed through the ordinary horn, and the utilization rate of the sound energy of the transducer is not high; more transducers are needed to meet certain requirements, resulting in large volume and high weight, which is not conducive to carrying, and at the same time, the waste of electric power is serious , not conducive to green environmental protection

(3) The sound wave emitted by the transducer and the ordinary horn is a point sound source. The propagation characteristics of the point sound source make the sound pressure level attenuate 6dB every time the distance is doubled. The sound wave decays quickly with the increase of distance, which is not conducive to the long-distance propagation of sound waves , the strong sound system generally requires the sound propagation distance to reach 2000-3000 meters or more

(4) Due to the high-intensity sound from the front, the side and back of the strong sound system will also produce very large, unnecessary noise that propagates to the back of the strong sound device through the air, waveguide, and strong sound device, seriously affecting the operation The health of personnel; at the same time, many strong sound systems can only reduce noise with sound-proof earmuffs, which seriously affects the information exchange between operators

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